Wrench



f. 7.. WW 4 w M w (No'ModeL) WRENCEL Patented Jan. 1'7, 1888.

UNITED STATES PATENT OFFIcE.

HENRY W. ATWATER, OF EAST ORANGE, NEW JERSEY.

WRENCH.

SPECIFICATION forming part of Letters Patent. No. 376,504, dated January17, 1888.

Application filed April 14, 1887.

Serial No. 2312833; (No model.)

T0 aZZ whom it may concern:

Be it known that I, HENRY W. ATWATER, acitizen of theUnited States,residing at East Orange, Essex county, New Jersey, have invented certainnew and useful Improvements in Removable Jaws for \Vrenches, fullydescribed and-represented in the following specification and theaccompanying drawings forming a part of the same.

The object of this invention is to cheapen the manufacture of theremovable jaw and to facilitate its application to theshank of abarwrench; and the improvement consistsin a novel form and arrangementfor the socket by whichthe jaw is fitted to the bar or shank of thewrench.

Instead ofmaking the socket open toward its rear end, and thus requiringthe application of some transverse fastening device across the mouth ofthe socket, as shown in United States Patents Nos. 214,697 and 51,961, Iform the socket with a lateral opening havingalug at its rear side, andam thus enabled to draw the jaw toward the bar orshank by a mereclamp-screw inserted through such lug and pressed upon the rear side ofthe shank. The mere slackening of such clamp-screw then serves torelease the jaw, and the lateral opening of the socket then'permits itsremoval from the shank without the delay occasioned by detaching anyremovable fastenings. The lateral opening of the socket also greatlyfacilitates the manufacture of. the removable jaw, as such socket, to bewell fitted to the shank, requires milling out by a rotary cutter, andthe depth of the socket is only about one-third as great when formed inthe side of the jaw as when formed in the rear. The jaw may thus be heldmore readily during the milling operation and subjected to much lessstrain than when cutting out a deep socket, and the cutters employed maybe of smaller size and less expensive.

The improvement may be applied to any of the detachable jaws used withstraight-shank wrenches, and several jaws with operative faces ofdifferent forms are therefore shown herein. I x

Figure 1 is a side view of an entire wrench having the auxiliary jawformed with inclined face and applied to the head of the wrench. Fig. 2represents asimilar wrench without the handle, and having the slidingjaw formed with asmooth sloping face, and the removable jaw of parallelform with serrated face. Fig. 3 represents a removable jaw having itsface inclined from both ends toward the center, and Fig. 4, a removablejaw with curved face. Fig. 5 represents a plan of any of the said jaws,as they are all constructed with sockets of the same form. a representsthe shank of the wrench, b the handle, 0 the head, and d the slidingjaw.

The jaws c and d (shown in Fig. 1) have parallel faces adapted to graspan ordinary bolt or nut, and the removable-jaw gis formed with slopingserrated face, so as to convert the wrench into a pipewrench whenapplied either to the head or'the sliding jaw d.

In Fig. 2 the sliding jaw d is shown with a smooth sloping face, d, andthe auXili-aryjaw g is formed with a face parallel to the head 0, so asto furnish the roughened surface necessary to co-operate with thesloping face d.

In Fig. 3 the auxiliary jaw has its face formed with two inclines, t,sloped toward the center, so as to grasp the pipe when turned in eitherdirection; andin Fig. 4a roughened concavity, j, is formed in theworking-face of the jaw to operate in a similar manner. Each of thesejaws is formed with asocket, 6, open ,at one side, 6, and having at itsrear a lug, a, through which is inserted a set-screw, f, to press uponthe rear side of the shank a. The rear side of the shank being flat, aVery slight movementof the setscrew serves to clamp the jaw to the shankor to release it therefrom. The log 6' is connected with the re movablejaw only by a tongue, 2, and is bent at a right angle with such tongue.The function of the screw is merely to keep the jaw from slipping off ofthe wrench-shank when in use, as all the real strain is sustained by thecontact of the jaw with the shank a and with the. head 0 or slide d, onwhich it is pressed when used. Thelaterally-open socket is much moreconvenient for application to the shank thanthe jaw slotted at the rearend, as in United States Patents Nos. 214,697 and 51,961. I herebydisclaim the said patents, and limit myself to the construction I haveshown and claimed herein.

What I claim is 1. The herein-described removable serrated jaw forbar-wrenches, having in its rear end a 6, open at one side, 6, and thelug being prosocket open at one side, whereby it may be atvided with theset-screw f, projected through tached to the wrench-shank. the lug einto the rear side of the socket, as [5 2. The combination, with theremovable and for the purpose set forth. jaw havingin its rear end asocket open on In testimony whereofI have hereunto set one side, of themeans, substantially as demy hand in the presence of two subscribingscribed, for holding the jaw in position. witnesses. Y

3. The removable serrated jaw for barwrenches, constructed as hereinshown and described, with the tongue e projected from its rear end atone side, and the lug e at a right angle with the tongue, forming thesocket HENRY W. ATVVATE R.

Witnesses:

HENRY J. MILLER, FREDERICK O. FISCHER.

